The CIA World's Facts Book was used it to verify the total
number of population in every country. But since it lacks the percentage of
Muslims in each country, we used another statistic located at: http://www.flash.net/~royal/country.html

In 1986, the Muslim Education Trust
organization (MET) located in the United Kingdom and directed
by Ghulam Sarwar, obtained the 1971 census and information
given by Embassies of the respective countries in London. The
1971 census showed the Independent Muslim countries
population was around 784.5 Million and the Muslim Minorities
countries had around 308 Million Muslim.

As for the U.N., the Briticana Encyclopidia
for 1994 and for 1995 was used to get the growth rates. Briticana took those
statistics from the U.N.

The final numbers were obtained by plugging in the percentage
of Muslims (taken from MET) and the number of people (taken from CIA) in each
country using Microsoft Excel.